INSTRUCTION MANUAL

DUROMETER

Model No. : ADM-A / ADM-D / ADM-E

Thank you for purchasing the Niigata Seiki Durometer.
Please read this manual thoroughly before use for proper operation.

PARTS IDENTIFICATIONAPPLICATIONS・Hardness test for rubber and plastic.

ＡＤＭ-Ａ
Thumb Rest

SPECIFICATIONS

Bezel
090

7080907050

Pointer Follower
Follower Knob

20090
10Test Hole
DUROMETER

3080

TYPE-E703060Pressure Plate

ＡＤＭ-Ｄ

Wear Test
Block
40

50

ＡＤＭ-Ｅ

Pressure
Plate
Indenter

ADM-E

ADM-A

Below A20

A20〜A90

Above A90

Soft Rubber,Eraser,
Roll Film,Low Hardness
Elastomer

Rubber,Soft Plastic,
Tire,
Med. Hardness
Elastomer

Hard Rubber,
Plastic,
Ebonite,High Hardness
Elastomer

ADM-D

Sample Thickness 10.0mm or greater 6.0mm or greater 6.0mm or greater
Indicator Accuracy±1 Scale Resolution
Indenter Material
HM35(SKH55)
Weightapprox. 170g
approx. 160g
approx. 160g
Accessories−
Wear Test Block

2040

IndenterIndenterPointer

4050
10DUROMETER
TYPE-D60

2030

600Hardness Range
Sample Material

10DUROMETER
TYPE-A80

Dial

Model No.

Dial Locking
Screw

Pressure
Plate

Wear Test Block

STANDARDS
This product is compliant with the following
standards with regards to Indenter shape, size,dimensions, and spring force.
JIS K 6253
『Rubber, vulcanized or thermoplastic - Determinationof hardness』
ISO 7619(E)『Rubber-Determination of indentation hardness bymeans of pocket hardness meters』

CAUTION・This product is to be used as Hardness Measuring Instrument forplastic and rubber. Please use only as directed.
・Only use within applicable measuring range for each model. Use
beyond specified range may cause errors or damage to instrument.
・Never press indenter against hard surface, such as glass or metal,
with the exception of testing using the Wear Test Block.
・Do not apply force greater than 2-3 times force specified by therelevant standards (JIS, ASTM, ISO, DIN, etc.) Excessive force
may affect accuracy and cause damage to the instrument.
・Do not apply lateral pressure or move the indenter when in contact
with test sample.
・Instrument is designed for using in vertical orientation withdownward pressure. Use in horizontal or upward direction will resultin inaccurate measurements.
・Please Note – Measurements taken by this instrument will varyfrom those taken using a different measurement standard, such as
JIS K6301, etc.
・This is a precision measurement instrument, Do not drop or apply
excessive force as it may result in inaccuracy.
・Do not use in wet or oily locations.
・Do not disassemble or modify.
・Do not use organic solvents (thinner, benzine, etc.) to clean.

TEST SAMPLES
Please insure that Test Samples meet the following conditions.
・Top and bottom surfaces should be smooth and parallel.
・Sample is free from scratches, air bubbles, and contamination.
・Sample meets the size conditions below:

Thickness: 6mm or greater (ADM-A, ADM-D)
Thickness:10mm or greater (ADM-E)【Test Sample Size Conditions】

Distance to edge: 12mm or greater (ADM-A, ADM-D)
Distance to edge: 15mm or greater (ADM-E)
Measurement Point spacing: 6mm or greater

Measurement Points (5x)

How To Use (Reverse)

HOW TO USE① Loosen the Dial Locking Screw and rotate the Bezel to align thePointer with “0”. Re-tighten the Dial Locking Screw.

【Measurement Points (5 locations)】（Figure:1）
Distance to edge:
12mm or greater (ADM-A, ADM-D)
15mm or greater (ADM-E)② Place the test sample on a flat, rigid surface.

③ Determine the locations for applying the indenter for test.
Locations should satisfy the two conditions below: (Figure:1)

Measurement Point spacing:
6mm or greater
Measurement
Points (5x)(1) More than 12mm from edge of test sample. (ADM-A、ADM-D)
More than 15mm from edge of test sample. (ADM-E)(2) Separated by at least 6mm from adjacent measurement points.
④ Hold the Durometer so that the two conditions below aresatisfied: (Figure:2)(1) The Pressure Plate is parallel to test surface.
(2) The indenter body is perpendicular to test surface.
⑤ Without causing shock, gradually press the indenter into thesurface until the Pressure Plate is against the surface of he testpiece.

Thickness:
6mm or greater (ADM-A, ADM-D)
10mm or greater (ADM-E)⑥ When the Pressure Plate is in contact with the surface, wait
following period before taking a reading:・Vulcanized rubber: after 3 seconds
・Thermoplastic rubber: after 15 seconds（Figure:2）⑦ Measurement is median value of the five measurement values
taken at different locations

USING THE POINTER FOLLOWER① Loosen the Dial Locking Screw and rotate the Bezel to align thePointer with “0”. Re-tighten the Dial Locking Screw.
② Rotate the Follower Knob counterclockwise, moving theFollower to the right hand side of the Pointer. (Figure:3)③ Take measurement. Maximum position of pointer will be records
by the Pointer Follower.

Gradually Press※ “Median” is determined by arranging values in ascending order,
and the median is the value in the center.

90010DUROMETER
TYPE-A80

2070

3060

4050

Right Angle

Parallel

INDENTER WEAR TEST (ADM-A、ADM-D)

Test Piece

With continued use, the indenter will wear. Check the wear
regularly using the following procedure and take the extent of wear
into account when taking measurements.
① Loosen the Dial Locking Screw and rotate the Bezel to align thePointer with “0”. Re-tighten the Dial Locking Screw.
② Place the supplied Wear Test Block on a flat, rigid surface③ Put the indenter into the test hole and press gradually to avoid
damage to the Wear Test Block. The gauge will read thenumber indicated below for indenter with no wear.

Right side of Pointer
9080010DUROMETER
TYPE-A

10 Durometer
Reference Point

75ADM-A Wear Test Block

PointerFollower

306025 Durometer
Reference Point

20Rotate

7075 Durometer
Reference Point25（Figure:3）

Pointer

5040Follower Knob

10ADM-D Wear Test Block※If indenter is worn, a lower number than specified will be indicated.

Niigata seiki Co., Ltd.
6-15-22, Tsukanome, Sanjo, Niigata, Japan, 955-0055
Tel. : +81-256-31-5660 Fax. : +81-256-39-7730

MAIL intl.sales@niigataseiki.co.jp
URL http://www.niigataseiki.co.jp
I260-K1510